They're all MSQ files from here:

http://www.symtechlabs.com/support/msq_rep.php

You can download TunerStudio MS, a program to open MSQ files and tune your MegaSquirt ECU, here:

http://www.efianalytics.com/TunerStudio/

For a fuel-only installation, you primarily want an MSQ file from an application with similar displacement, induction and fuel pressure characteristics to yours (i.e. 2.0L and turbocharged). It also helps to find an MSQ file taken from a MegaSquirt ECU using the same MAP sensor as yours. Many of the other settings are trivial to change if they don't match your needs, including fuel injector size.